665046664 has 32 divisors (see below), whose sum is σ = 1389808800. Its totient is φ = 296490240.

The previous prime is 665046661. The next prime is 665046673. The reversal of 665046664 is 466640566.

665046664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 665046664.

It is not an unprimeable number, because it can be changed into a prime (665046661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126102 + ... + 131269.

It is an arithmetic number, because the mean of its divisors is an integer number (43431525).

Almost surely, 2^665046664 is an apocalyptic number.

It is an amenable number.

665046664 is an abundant number, since it is smaller than the sum of its proper divisors (724762136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665046664 is a wasteful number, since it uses less digits than its factorization.

665046664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257413 (or 257409 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 43.

The square root of 665046664 is about 25788.4986767357. The cubic root of 665046664 is about 872.8722894620.

The spelling of 665046664 in words is "six hundred sixty-five million, forty-six thousand, six hundred sixty-four".